WooCommerce – Features List Here – Touted as the number one e-commerce plug-in for WordPress users and free to use – plus lots of extensions available.

JigoShop – Features List Here – Another e-commerce plug-in for WordPress – this time it is premium and not free to use.

Cart66 – Features List Here – Cart66 is another platform for selling on WordPress, it has Cart66 Pro for $149 one-off fee for unlimited site use or you can use the hosted Cart66 Cloud version for a subscription – all with 30 Day Money Back Guarantee.

Drupal:

Drupal Commerce – Features List Here – This is an e-commerce plug-in made for the Drupal CMS, free to use and has an online live demo – plus lots of extensions available

UberCart – Features List Here – Similar to Drupal Commerce, this cart works with the Drupal CMS system and is free to download

Joomla:

MijoShop – Features List Here – A premium e-commerce plug-in for the Joomla CMS system – online Demo Available

http://www.emthemes.com/- good range of premium themes for magento, new themes released every month, full customization available – a good range of responsive templates now available

http://www.hellothemes.com/- full premium range of themes (some optismised for mobile and Go), tweaks and modifcation services – also PSD to magento theme service, access to as many themes as wanted with the club membership (for developers). New monthly themes released.

I have decided to collate and add a section specifically for plug-ins and extensions for e-commerce platforms, so if you are looking to get more functionality and extend the power of your website then have a little look at the links below:

Multiple Cart Extensions:

http://codecanyon.net/?osr=tn – The biggests collection of extensions modules for Open Cart, Magento, osCommerce, Zen Cart, VirtueMart, PrestaShop, UberCart, WooCommerce, JigoShop and WP-Ecommerce all in one place, from small prices and with direct contact to developers.